And just what was Sierra Club’s issue with the report’s findings? Sierra Club claims USGS “failed to include in its analysis the Marcellus Shale, the country’s largest gas reserve.” This particular study was purely focused on three shale plays located in the Gulf region of the U.S.; however, USGS has conducted several studies on Pennsylvania and the Marcellus since 2012 and has a Marcellus-specific study planned for this year, as E&E News recently explained.

Sierra Club also tried to pass blame off on President Trump’s administration, claiming the study, which was conducted from 2015 to 2016 under the Obama administration, “seems to be part of a troubling trend from this administration of attempting to erase science that is inconvenient for their friends in the fossil fuel industry.”

What the Sierra Club does not dispute — that actual findings of the study — just so happens to be the only thing that really matters.

This study echoes the topline conclusions of an already overwhelming list of peer-reviewed papers – seven from government agencies – concluding hydraulic fracturing is not a major threat to drinking water.

That list of research includes last month’s Duke University (and Natural Resources Defense Council funded) study that found fracking “has not contaminated groundwater in northwestern West Virginia.” It is also in line with the conclusions of the recently finalized U.S. Environmental Protection Agency’s (EPA) five-year study, which found no evidence of widespread water contamination of drinking water from fracking. In addition to those two examples, the most notable examples of studies showing fracking is not a threat to groundwater are: